I can't. I'm not gonna argue that it's not inappropriate and weird, because it's both of those things. I just don't think it's sexual. He's apparently stopped doing it since people told them it made them uncomfortable.
But my original point before we got sidetracked is that trump has also said things that you people don't take seriously. Biden has a stutter, something you people often mock him for, and he misspoke when he mentioned the "inclusive voter fraud organization." It was a slip of the tongue, something he's known for.